package jdbc;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;

public class JDBCDemo4 {
    public static void main(String[] args) throws ClassNotFoundException, SQLException {
        Class.forName("com.mysql.cj.jdbc.Driver");
        Connection connection = DriverManager.getConnection(
                "jdbc:mysql://localhost:3306/tedu?characterEncoding=utf8&useSSL=false&serverTimezone=Asia/Shanghai&rewriteBatchedStatements=true",
                "root","root");
        System.out.println("数据库链接成功");
        Statement statement = connection.createStatement();
        /*
        UPDATE userinfo
        SET username='小张'
        AND nickname='usually'
        WHERE id=2;
         */
        String sql="UPDATE userinfo\n" +
                "        SET username='小张'\n" +
                "        AND nickname='usually'\n" +
                "        WHERE id=2;";
        int num =statement.executeUpdate(sql);
        System.out.println(num>0?"修改成功":"修改失败");
    }
}
